air -conditioning and refrigeration AS 1571-2020 pdf download.Copper – Seamless tubes for air -conditioning and refrigeration. A designation comprising 0 (annealed), 1/2 H or H (hard drawn) shall he used to signify the temper of
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air -conditioning and refrigeration AS 1571-2020 pdf download.Copper – Seamless tubes for air -conditioning and refrigeration. A designation comprising 0 (annealed), 1/2 H or H (hard drawn) shall he used to signify the temper of
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